Ventilating-fan.



. Figi. I .f

.Witnessesa Thvemtior. f Lems' L Holladay. gm': L WM@ AttyPATENTBD'DEG.' 25, 190s;

` Y' UNITED" sTATns PATENT .orrron.

No.:agaq t I Winnaar-.italmgtst`14,ie3. stiamo.169.484.

f 'Beit kn'own that .-I,fLEw Ts LJHolLLAnA/r,

'I y" a-citizen of the United States,l residing at Lynm inthe vcou'ntyofEssex, VState Iof Massa chusetts, have invented certain new anduseimprovements invVentilating Fans, of'

i ventilating-fans, and. 'more particularly to .design that class ofrotary fans which are adapted to be automatically shiftedl about lapivoted axis, so that' the air-blast created thereby sweeps over aconsiderable area instead of bee ing confined toone particular path.

The object of my invention is to provide an improved device of thischaracter 'and in whichvoscillationsabout a pivotal axis are producedbythe thrust ofits own air-blast controlled by means which may beapplied to the ordinary forms of motor-fans in such a manner-as not todetract fromtheir general or appearance. v j

The Vinvention consists in combining with a4 pivotally-supportedmotor-fan' means for screening more or less of the air-impelling memberon alternate sides of the pivotal axis and. means for reversing theposition of the screeningmeans.

y. vMy invention will be readily understood upon reference lto thefollowing description and the accompanying drawings, formingv a part ofthis specification, in which-' Figure 1 is a side elevation of apivotally-y supported motor-fan embodying one form of my invention; andFig; 2 is a front elevation thereof with ,thel blast-impelling memberremoved. The motor A, the armature-shaft B, to which the blast-impellingblades C are connected, and the u right supportingebase D y may be ofany of t e ordinary constructions.

The upright base D. is carried by a subbase 1 l and pivotallysupportedthereon about a pivotal axis by a concentric ball-bearing 2located near the eripheries ofthe bases.

, The means or screening the blades C, so that the air thrust thereonwill be unequal on opposite sides of the plane of the axes of rota-'tion and oscillation, consists of an eccentric plate o r sector'S,supported. in proximity to the blades C and adapted .to ,be shifted fromI its position on one side of the plane of the axes, as indicated inFig. 2, t`o they `o posit'e side thereof. The sector 3 is providewith'a,

subbase D.

Lewis noLLr/:inxnon LYNN, j MASSACHUSETTS, Assreuon Thorens-.h aAL..;nLEcTR1c onwaar. A CORPORATION or New `vonk.

Patented ineens, 190e.

side lug 4, having an aperture throughwhich the shaft B passes, and issecuredlby a rowof rivets 5, concentric with the aperture,to a sleevedblock 6, journaled uponzthejshaft. The block 6 has projecting radiallyfrom its rearend an arm 7, having .an outwardlyflaring recess`8 thereinand adapted toengageat its respective'o'uter edges with stop projecftions 9, secured to the front end of t e frame -4 of the motorA toprevent the sector?, from swinging beyond its respective'operativepositions when shifted from one to t e other.

The means for shifting the sector'3 from one side of the' vertical`plane to the other consists of a narrow lever 10, pivoted at itsl innerend about the shaft B, extending 'outwardly through the flaring recess 8and ada ted by the lost motion permitted bythe wi e s ace between theflaring walls of the recess, W ich constitute spaced shoulders, tonormally rest with its outer. end below the horizontal plane of theshaft B, so that when it meets some stationary'part 11 as it' is carriedalong in the oscillation of the fan about its vertical axis it will be'caused to turn, downwardly and rearwardly, carrying .with it the sector3 until the center of gravity of the latter has been moved to theopposite side of its pivotal point, 4when the disk will fall undertheaction. of gravity to its reversed position andl produce a counteroscillation of the fan. The

stationary part 11'consists of an outturned end of a bracket 12,extending'up from the In the arrangement shown each oscillation`comprises a complete rotation of lthe fan.

However, lncases where 1t 1s desirable to restrict the movement of thefan to oscillations of less than three hundred and sixty degrees asecond bracket 12 may be provided, which will be spaced from thefirstfdistanceproportional to the length of oscillations desired.

I. do not desire to restrict myself to the particular embodiment hereindescribed and illustrated, for it is apparent that it may be lchangedand modified yin many respects without departing from my invention.

What I claim as new, and desire to secure vby Letters Patent of theUnited States, is-

- 1. The combination with a pivotally-supported ventilating-fan, of ascreen mountedI on the axis of the blast-impelling member with itscenter of effective area normally to one side of said axis, and meansfor moving mally 13o one side of said axis, and meali-.ior 7 l portedventilatng-fen, of a screenpvotel y mounted en the axis of theblast-impelling -.f^'1e.nf1ber with 'ats ce1-iter ofefec-t ve arennormf'vmg said screen from one side to che other sc'reenfrom one side to3, Te combination with a pivoiallyesl.1p-V

portal ventilmingfan, of screen mounted on the axis of theblast-impelling membel,

' and lmesme .t9 -Lmt the movement of saiii .-screen.

L The oombiiiiitiom With'a pivotally-supported Ventilating-fan, of ascreen. mounted .spaced s. Y poijted be..-Ween said shoulders andadopted for eceentrie movementzinproxrit to the blast-imellingmemberthereof an having ouldere ithereon, land eglev r,r sup,- toengfzge some sationaiy part.'i

he combination of a'pivotxLlly-'suppol'ted ven'.lzemtinfig-fsm7 of asleeved block 3011i'- naled upon tbe shit of the blestmpellir memberthereof and provided with a radiifl recess, a screen secured abone ed eto said blOk, tending v4through said`recess inthe block and ladfoted toengage some' .tntonomy-part.

. In WitneF-Q whereof I .have'hereunto set my hand this lzh day of Auust, 1903.

' LEWIS HOLL'ADAY. -Witnesses JOHN Ji WALKER.

and a lever lpivoted upon sai shaft ex-v

